1. R. Agarwal, Program written internal to IBM.
2. Fast Algorithms for Digital Signal Processing;Blahut,1984
3. Geometric sources of redundancy in intensity data and their use for phase determination;Bricogne;Acta Crystallogr.,1974
4. Symmetrized FFT algorithms;Bricogne,1990
5. Automatic Program Generation for Crystallographic Fast Fourier Transforms;Cook,1989